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COSRX vs Principia

Rated by Lovi · Unbiased, science-based skincare AI trained on real user outcomes · How the Fit score works

COSRX and Principia are skincare brands offering thoughtful arrays of cleansers, serums, moisturizers, masks, and precise formulas. The Korean brand is beloved for its trusted ingredients like hyaluronic acid, glycerin, and niacinamide, while both suit oily skin and acne-prone skin best. The brands differ as COSRX also suits mature skin and includes standout items such as the Advanced Snail Mucin Gel Cleanser, the Full Fit Propolis Synergy Toner, and the Centella Water Alcohol-Free Toner, whereas Principia features offerings like the Gel de Limpeza GL-01 to help maintain a healthy, balanced complexion.

COSRX is a Korean skincare brand founded in 2013 and owned by Amorepacific Group since 2024.

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This page compares some of the most popular COSRX and Principia products; for every product of both brands, with a fit score for your own skin, use the Lovi app.

Popular COSRX vs Principia products

Questions and answers

COSRX or Principia: which is better?

COSRX offers a much larger variety of products on this page across multiple categories like cleansers, essences, and sunscreens, whereas Principia features only a single cleanser. Reviewers often mention that COSRX products provide deep hydration and lightweight absorption.

What is the difference between COSRX and Principia?

COSRX offers a wide range of 38 products designed to fit oily, acne-prone, and oily acne-prone skin best, whereas Principia is represented on this page by a single cleanser with lower fit ratings for those skin types.

COSRX or Principia: which cleanser is better?

COSRX offers a much wider range of cleansers on this page with higher Lovi fit levels across multiple skin types, whereas Principia features only one cleanser with average to low fit levels. Reviewers note that COSRX cleansers provide gentle and effective cleansing.

Which is more affordable, COSRX or Principia?

The provided page facts do not contain pricing information, so it is not possible to determine whether COSRX or Principia is more affordable.

Which causes fewer breakouts, COSRX or Principia?

COSRX offers multiple products with Superior or High Lovi fit levels for acne-prone skin, such as the Advanced Snail 96 Mucin Power Essence, whereas Principia features only one general cleanser on this page with lower acne ratings.

Between COSRX and Principia, which brand was founded earlier and in which country?

COSRX was founded earlier in 2013 in South Korea, whereas Principia was founded in 2020.

How does the fragrance content compare between COSRX and Principia products on this page?

COSRX has fragrance in one of its products on this page, whereas Principia has no fragrance listed for any of its products.

Which COSRX products receive a 'Superior' Lovi fit level for dry skin?

COSRX products such as Advanced Snail 96 Mucin Power Essence, Advanced Snail Mucin Gel Cleanser, Galactomyces 95 Tone Balancing Essence, Full Fit Propolis Synergy Toner, Advanced Snail Mucin Power Sheet Mask, Full Fit Propolis Honey Overnight Mask, and Pure Fit Cica Serum receive a Superior Lovi fit level for dry skin.

Research behind their key ingredients

Behind this comparison

Lovi compares products by their fit scores, calculated from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.

  • Nadia Kapleva, MS

    Nadia Kapleva, MS

    Co-founder, Medical Director

    Cosmetic chemist, cosmetologist, aesthetic products developer

  • Alexey Shagraev, PhD

    Alexey Shagraev, PhD

    Co-founder, CEO and CTO

    PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex

  • Dr. Sofía Perea Pérez, MD, MSc

    Dr. Sofía Perea Pérez, MD, MSc

    Medical Board

    Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine

  • Aishani Shah, MD

    Aishani Shah, MD

    Medical Board

    Specialist dermatologist, MBBS, MD, IFAAD

  • Asya Zubkova, MS

    Asya Zubkova, MS

    Medical Board

    Cosmetic chemist, SCS, IFSCC member

  • Hanna Kurets, MD

    Hanna Kurets, MD

    Medical Board, Medical Advisor

    Dermatology MD

  • Elina Nazarenko, MD

    Elina Nazarenko, MD

    Medical Board

    Dermatology and diagnostic consultant

  • Victoria Derkova, MS

    Victoria Derkova, MS

    Medical Board

    Cosmetic chemist, cosmetic development technologist

How does it fit your skin?

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